As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE RIGHT WING FUEL TANK INCREASED 1000 NR WITH PROPORTIONAL LEFT WING DECREASE. ON DOWN WIND AND FINAL LEG, THE RIGHT WING FUEL TANK INCREASED 1100 NR WITH PROPORTIONAL LEFT WING DECREASE. OPENED THE FUEL TANKS AND CHECKED THE VENT FLOAT VALVES. VALVES CHECKED GOOD. CONDUCTED MANIFOLD PRESSURE CHECK WITH THE CROSS-FEED VALVE CLOSED. NO LEAKS THROUGH THE CROSS-FEED VALVE. NOT ABLE TO DUPLICATE OCCURRENCE ON GROUND.